Web Reference: Variables declared with the var keyword can NOT have block scope. Variables declared with the var keyword, inside a { } block; can be accessed from outside the block. If you assign a value to a variable that has not been declared, it will become a GLOBAL variable. Mar 13, 2026 · Variables declared with var do not have block scope. A var variable declared inside a function is accessible throughout that entire function, regardless of any blocks (like if statements or for loops) within the function. In JavaScript, the scope of a variable determines where it can be accessed within the code. In this tutorial, you will learn about variable scope in JavaScript with the help of examples.
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